<template>
  <div class="login-container">
    <div class="mask"></div>
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">
      <div class="title-container">
        <h3 class="title">COMIC管理系统</h3>
      </div>
      <!-- 用户名 -->
      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          v-model.trim="loginForm.username"
          :placeholder="$t('login.username')"
          name="username"
          type="text"
          auto-complete="on"
        />
      </el-form-item>
      <!-- 密码 -->
      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :type="passwordType"
          v-model.trim="loginForm.password"
          :placeholder="$t('login.password')"
          name="password"
          auto-complete="on"
          @keyup.enter.native="handleLogin" />
        <span class="show-pwd" @click="showPwd">
          <svg-icon icon-class="eye" />
        </span>
      </el-form-item>
      <!-- 提交按钮 -->
      <el-button
        :loading="loading"
        type="primary"
        class="submit-btn"
        @click.native.prevent="handleLogin"
      >
        {{ $t('login.logIn') }}
      </el-button>
    </el-form>
  </div>
</template>

<script>
import { isvalidUsername } from '@/utils/validate'
import LangSelect from '@/components/LangSelect'
import SocialSign from './socialsignin'
import userModel from '@/api/user'
import NProgress from 'nprogress'
import 'nprogress/nprogress.css'

export default {
  name: 'Login',
  components: { LangSelect, SocialSign },
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!isvalidUsername(value)) {
        callback(new Error('Please enter the correct user name'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('The password can not be less than 6 digits'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: ''
      },
      loginRules: {
        username: [{ required: true,message: '请输入账号', trigger: 'blur'}],
        password: [{ required: true, message: '请输入密码',trigger: 'blur' }]
      },
      passwordType: 'password',
      loading: false,
      showDialog: false,
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  mounted() {
    this.setButtonGradientTracking()
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
    },
    handleLogin() {
      this.loading = true
      NProgress.start();
      this.$store.dispatch('LoginByUsername', this.loginForm).then(() => {
        setTimeout(() => {
          this.loading = false
          NProgress.done()
          this.$router.push({ path: this.redirect || '/' })
        }, 300)
      }).catch(() => {
        this.loading = false
      })
    },
    afterQRScan() {
      // Do nothing
    },
    // 设置提交按钮鼠标悬停动画
    setButtonGradientTracking() {
      const btn = document.querySelector('.submit-btn')
      btn.onmousemove = function(e) {
        const rect = e.target.getBoundingClientRect()
        const x = e.clientX - rect.left
        const y = e.clientY - rect.top
        btn.style.setProperty('--x', x + 'px')
        btn.style.setProperty('--y', y + 'px')
      }
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss">
  /* 修复input 背景不协调 和光标变色 */
  /* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

  $bg:#283443;
  $light_gray:#eee;
  $cursor: #fff;

  @supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
    .login-container .el-input input{
      color: $cursor;
      &::first-line {
        color: #454545;
      }
    }
  }

  /* reset element-ui css */
  .login-container {
    .mask {
      position: fixed;
      width: 100%;
      height: 100%;
      background: #c2dad8 url("../../../static/images/assets/login-bg.jpg") center center;
      background-size: cover;
      filter: blur(10px);
    }
    .el-input {
      display: inline-block;
      height: 47px;
      width: 85%;
      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        padding: 12px 5px 12px 15px;
        color: #454545;
        height: 47px;
        caret-color: #454545;
        &:-webkit-autofill {
          -webkit-box-shadow: 0 0 0px 1000px #ebebeb inset !important;
          /*opacity: 0.06;*/
          -webkit-text-fill-color: #454545 !important;
        }
      }
    }
    .el-form-item {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: #ebebeb;
      border-radius: 5px;
      color: #454545;
    }
  }
</style>

<style rel="stylesheet/scss" lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  position: fixed;
  background: #c2dad8 url("../../../static/images/assets/login-bg.jpg") center center;
  background-size: cover;
  height: 100%;
  width: 100%;
  .login-form {
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    width: 520px;
    max-width: 100%;
    padding: 35px 35px 15px 35px;
    margin: 120px auto;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 10px;
    box-shadow: 0 10px 10px -10px rgba(0,0,0,.5)
  }
  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;
    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }
  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }
  .title-container {
    position: relative;
    .title {
      font-size: 26px;
      color: #808080;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
    .set-language {
      color: #fff;
      position: absolute;
      top: 5px;
      right: 0px;
    }
  }
  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
  .thirdparty-button {
    position: absolute;
    right: 35px;
    bottom: 28px;
  }
}
.submit-btn {
    width: 100%;
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
    &::before {
      --size: 0;
      content: '';
      position: absolute;
      left: var(--x);
      top: var(--y);
      width: var(--size);
      height: var(--size);
      background: radial-gradient(circle closest-side, rgba(255,255,255,.3), transparent);
      transition: width .2s ease, height .2s ease;
      transform: translate(-50%, -50%);
    }
    &:hover::before {
      --size: 200px;
    }
  }
</style>
